WhichToolWitch
A simple Cocoa wrapper for the UNIX command-line tool which by John Joyce.
Screenshot
System Requirements
Mac OS X 10.4 and up, works on Leopard, too.
Download
You can play with it, all you want. It is a trivial app by most standards. For me it was a way to get a handle on a tiny bit of Cocoa and NSTask. As always, because it is free and trivial, there is no warrantee or guarantee of any kind.
Download Which Tool Witch here.